Noise cancelling is distorting sound

Hello everyone, in my headset both the speakers are working perfectly fine, but when I use the ANC the right one becomes unhearable. I believe it can be a problem with the mic on that side, how could I disassemble the unit to see what the problem could be?

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Here is a guide to disassemble the headphones

Sony WH-1000XM3 Battery Replacement

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